Agile Development to Support State Assessment Analyses
Intern Update #1
Brian Harrold and Erik Whitfield
June 20, 2025
Project Overview
Brian Harrold and Erik Whitfield
Goal
Workflow
R and R Studio
GitHub
Quarto
cohortED package
Brian Harrold
Focus of the Package
Cohort Analysis for Educational Research
Demographics
Student Mobility
Longitudinal Analysis (Cohort-Tracking)
Cross-Sectional Analysis (Cohort-Comparing)
Related Work
SGP (Student Growth Percentiles)
Vocabulary
Classifications:
Leave, Join, Stay
From Cohort Analysis:
Churn
Ideal Dataset
Longitudinal Student-Level Data
Example:
sgpData_Long from SGPdata package
Requires:
Grade Level and Academic Year
Optional
Demographics, Subgroups, Performance, School/District, etc.
Enabling the Ideal
Helper Functions
make_achievement_levels(), make_proficiency_levels()
make_mobility(), make_first_entered()
standardize_grade()
Visualizing
Plotting Functions
plot_distribution_mobility()
plot_alluvial_mobility()
plot_cohort2_proficiency()
Analyzing
Analysis Functions
Persistent Challenges
Flexible Arguments
Cohesive Functionality
Data Limitations
Dynamic Reporting
Resources
Quarto Website
GitHub Repository